Furnace construction



Feb. 13, 1940. H. F. CURTIS FURNACE CONSTRUCTION Filed Sept. 23, 1958 INVENTOR. Herer @arf/o". BY

Patented Feb; 13, 1940y FURNAOE CONSTRUC'IIIONA Herbert'F. Curtis, Berea, Ohio,4 assigner to Henry Furnace & Foundry Company, Cleveland, Ohio, a 'corporation of Ohio Application September 23,1938, Serial No. 231,365

I have heretoforebeen constructed whereby they Y can. be madev up in any desired number of sections, and furnaces adapted to burn gas have also been of sectional structure', `[there were many deficiencies in these constructions, which it is the purpose of the present invention in a large measure to overcome. i l

For instance, such prior furnaces usually required special end sections and special intermediate sections. which' end and intermediate sections were notinterchangeable. By the present invention each section comprises two main section parts or halves which are bolted together to form a section, which sections are alike andv may be securedl together to form a battery of sections makingv up the unitary ,furnace structure.

- Furthermore, and what is vof still greater importance, was the fact that once assembled there was no means whereby the passages between the combustion chamber and the outlet could be read- .ily cleaned Without dismantling the entire furnace. kBy the present invention there are provided removable sections of the bales which may` be'removed through the inlet door and which when removed provide access to all interior parts of the unit without further dismantling of the furnace. i

Still other advantages of the invention and 4the invention itself will' become more apparent from `the following description of an embodiment,

y which description is illustrated by the accompanying drawing and forms apart of this specification:

"In the drawing:

Figure 1 isa vertical elevational view of one of the unit sections, showing the fixed and re` movable baiiles, the removable bailles being shown in section; y

Figure 2 is a front elevational view of a battery of sections inassembled position;

' Figure 3 is a fragmentary view partly inelevationv and partly vbrokenaway showing the locking baiile removed and the other removable baille in the process of being removed;

lFigures land 5 are perspective viewsof the removablel baflles.-

Referring now to the drawing throughout which like parts have been designated by like reference .f characters, the furnace illustrated.' isl only the"l (ci. 12s-431V interior. heat exchange structure. The outer housing may be of anydesired type and the inventionA herein resides in the `heat exchange u nit per se. I y i l Each vsection of the assembly comprises right 5f and left housing halves l and y2 formed to provide inlets 3 disposed atthe vbottom forward ends and outlets l at the top back ends. yEach housing half has a peripheral flange 5 from whichextend lugs E. The flanges may be ground so as to pro` vide a tight joint- In this instance, however, a groove 'i kis provided in the face of one or more. ,l of the flanges in which a suitable sealing gasket or `compound may bel placed.

.The exterior ol?l each. section'is providedwith. 15

. to, permit assembly of the sections into batteries,

ofsections to ici-many desired size of unit. Rectangular openings l0 extend through the matched sides of the unit which provide means of com.

`munication lbetween the separate sections and forma substantially continuous combustion chamber. This provides means whereby separate jburners may need only one pilot light which may be supplied at a master section, which is usually the center section, although obviously if only two sections are used it could'be either one of the sections. The openings `in the outside sections are sealed `by suitable plates bolted thereon; or in a three section unit two pilot lights may be provided between the first and second and second and third burners. y ,i The names `,fromthe burners l l extend upward and the products of combustion impinge against a bale I'ZaIong'which they travel in a generallyV horizontal direction toward the rear of the unit as indicated by the arrows. Thence they escape around thev end `of the bailie l2 and pass upward, engaging the baiile'lt, where they travel in a substantiallyv horizontal plane toward the front' L of the unitand escape around the end of the baffle at'the front of. the furnace` They then rise 501 upward', engaging the top, traveling rearward and escaping at the outlet 4 from where lthey are conf PATEN-T OFFICE the housing and comprise inwardly extending ilanges on each housing, which abut at their edges to bridge the space across the housing. The baille i3 extends from the back wall to a point spaced from the front of the housing and the baille l2 extends from a point spaced from the back wall to a point spaced from the front of the housing, all as is best illustrated in Fig. 1.

It being desirable to close the space between the forward end of the'baille l2 andthe front of the housing, in order that the combustion products do not escape directly to the top of the housing, a baille l5 is provided. This baille is best shown in Fig. 4 and is provided with an oiset end It for engagement with the front end of the baille` l2, and a curved body portion Il which connects to a downwardly depending portion I8. This baille rests on curved flanges I9 of the same contour as the baille, which anges are 4integral With and extend inwardly from each side of the housing. Means for holdingthe baille I5 securely in place `on, the rlange is provided, which means further closes ori thel combustion chamber from the forward upper end. of the housing, and includes a second removable baffle 2B, as best shown in Fig. 5. One end ofthe baille 20 rests on the forward side oi' the housing and the other end seats on a transverse rib 2l formed integral with the vbaille i5. As in the case of the baille I5, ribs` 22 are provided on the vside of the housing. The handle 23 is provided for the baille 2d extending from the undersideof the baille toward the housing inlet 3.

It will thus be seen that the removable bailies provide an interlocking engagement which securelyitholds the same in place and that they thus close off the front end of the housing between the front end andthe baille I2. The downl wardly depending portion. I8..also directs the products of combustion in an upward and rear- Ward direction.

It is to be noted that the names extend down-v ward slightly in the direction of ilow of the l i `vproducts of combustion.

intimate contact of said products with not only the bafflesbut the housing walls, slightly retarding the ow and assisting in eiecting a'greater heat exchange from the combustion products to the housing.

It should be particularly noted that by this arrangement the baille 20 can be removed lby grasping the handle22, up-ending the same and withdrawing it through the opening3, as shown by the dotted vlines in Fig. 1. When the baille 20 is removed, the baffle I5 may then be removed in a similar manner, 'the partZI furnishing a good hand hold for manipulating the same. -The baille l5 is shown in the lprocess of removal in Fig. 3.

` It will thus be seen that when the baffles are removed, which removal may be readily accomplished through the opening 3, that full access l is had to all parts of the housing whereby accumulated soot and dust may be readily removed and the interior parts thoroughly cleaned Without the use of special tools.

Having thus described my invention in an ture 'otherthan is delineated in the accompanying claims, and thatthe claims should be construed with the range of equivalents to which theyV are entitled in view of the-priorart.

This causes a -more I claim:

1. A heater of the class described including a housing comprising matched right and left-hand sections, said housing being formed to provide an inlet at the bottom and an outlet at the top, in-

wardly extending portions on said housings adapted to abut each other and to provide bailles i I extending across said housing, said ballles being arranged to provide a sinuous horizontal -ilowv for the products of combustion from the inlet to the outlet, said bailles being interrupted adjacent one end and removable plates being propoint of interinlet at the bottom and an outlet at the top, in-

wardly extending llanged portions on said housing adapted to abut each other to .provide baffles extending transversely across the housing, said bailles being arranged to cause a sinuous flow for.; the products of combustion in horizontal planes disposed one above the other,v at least one of said baffles being interrupted at one end to provide an opening, a removable plate disposed over said opening, a second removable plate engaging the wall of the housing and the rst `plate to lock the iirst plate in position and to provide ka further4 baille for the products of combustion.

3. A heating unit of the classdescribed comprising right and left-hand-,housing sections`` adapted tobe secured together to provide a combustion and heat transfer chamber having an inlet and an outlet, each of said sections having inwardly extending ledges adapted to abut each,

other when the housing is assembled to provider I i partitions extending across the housing, said partitions being arranged to cause the productsof` combustion to travel in vertically spaced hori-v zontal planes from the front to the rear and rear..` 1

to tn@ frontv of saiahousing, said haines being formed to provide an opening at the front ofthe housing and a removable baille plate forclosing.

said opening, said baille plate being removable through the housing-inlet, `a second removable baille plate adapted to engage said rst baille platey and the housing wall to vhold said rst baille;

in position and also being'removable-through said inlet.

4. A furnace comprising matched left and right housing portions adapted to be placed together to form a housing section, said sections formed with faces disposed on opposite sides of each section and adapted to be matched with each other 'andl formed to provide openings therethroughpsaid sections adapted to be assembled in juxtapositiony to each other in batteries with rsaid'openings in I alignment to provide a unitary structure, burners disposed in said sections and communicating'with each other through said` openings, .each of said..

housingA portions having inwardly extending flanges adapted to abut each other to form partitions inthe housings, said partitions being arranged to cause a continuous sinuous flow of. the

products of combustion through the housing, at

l least one oaf said partitions being interrupted to embodiment thereof, I am aware that numerous provide a cleanout opening'and a' removable'v baille for closing said opening and a second 're- -movable baille for locking said rst baille in placeand further closing ysaid opening.

5. In a structure of the class described, a nouss 'I ing formed to provide an inlet an outlet and a combustion chamber, substantially horizontally.'l

chamber for causing theproducts of combustion to flow in horizontal'planes disposed labove each'A other from the inlet tothe outlet, one vof said baiiies being interrupted 'at the' inlet opening of on said vhorizontal baille and having a downward# :1y depending portion spaced from the 4front Wall of the housing, a transverse ledge on said curved baiile and asecond removable `baffle plate having one end adapted to engage said ledge and thek other end to engage said housing to lock said rst y removable baiileinplace and close the housing from the inlet, said bafllesbeing easily removable kto provide ingress to the housing between said baffles for cleaning and inspection purposes.

6.'r -A heater of the class described including a housing comprising matched right and left-hand sections, said housing being formed'to 'provide an inlet at the bottom and an outlet at the top, in-

Wardly extending portions on said housings adapted to abut each other and to provide baiiies l extending across said housing, said bailles exltendingfrom the front to the rear of the housingand inclined downwardly in the direction of` the flow of the gases to provide a substantially horizontal flow for the products of combustion from the inlet to the 'outlet planes spaced kone above the other, said baffles being interrupted adjacent one end and removable baflles being prov vided to close the rst Inentioned'baiilesat the vpoint of interruption.-

` HERBERT CURTIS. 

